I was reviewing this issue and wanted to post a little closure. In
response to Henry's request to submit a feature, Mike Kay did so
(http://www.w3.org/Bugs/Public/show_bug.cgi?id=4767).
However, that request was formally deferred until post XSD 1.1.
Reading Mike's proposal it appears that it would satisfy the DITA (and
DocBook) requirements for override. Too bad it won't be in 1.1. So it
goes....
Cheers,
Eliot
--
Eliot Kimber
Senior Solutions Architect
"Bringing Strategy, Content, and Technology Together"
Main: 610.631.6770
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